XON

from Jargon File (4.4.4, 14 Aug 2003)

XON
 /X.on/, n.

   Syn. {control-Q}.

from The Free On-line Dictionary of Computing (8 July 2008)

control-Q
DC1
XON

   <character> (Or XON, DC1, {Device Control} 1) The character
   with {ASCII} code 17, used in {software handshaking} to resume
   output after a previous {control-S}.

   [{Jargon File}]

   (1996-06-28)

from V.E.R.A. -- Virtual Entity of Relevant Acronyms (June 2006)

XON
       eXchange ON (MODEM)